var sourceMap = require('source-map');
var fs = require('fs');

fs.readFile('../ios-release.bundle.map', 'utf8', function(err, data) {
  var smc = new sourceMap.SourceMapConsumer(data);

  console.log(
    smc.originalPositionFor({
      line: 344, //报错的行
      column: 868 //报错的列
    })
  );
});
